When I type into any of the inputs the text is dark, are you wanting the placeholder text to be darker as well?
As for increasing the font size on the items you add to the quote just add this CSS in:
div.emd-container .select2-container--default .select2-selection--multiple .select2-selection__choice{
font-size: 100%;
}

I always use these:
https://tools.pingdom.com/
https://developers.google.com/speed/pagespeed/insights/
https://www.webpagetest.org/
Not in any particular order. Keep in mind though, they can throw false positives. Such as items that are not really issues or you actually have no control over such as included live chat from another service etc..

Yes, you'll find them annouced here: https://forums.prodjex.com/forum/21-announcements-news/
Here was April's
Still working out May's contest, but will announce it this week with some structure changes.